GSM call re-establishment service allows a mobile station to resume a call in which the radio link has been temporarily interrupted due to interference or bad signal (which is referred to as an interrupted call). This service increases end user satisfaction and network quality perception. In this paper, we propose analytic models to study the performance for call re-establishment service. Our s...

Companies may choose to outsource parts, but not all, of their call-center operations. In the course of studying contact centers in the telecommunications and financial services industries, we have observed the following (apparently) common scheme. A company classifies its customers as high or low-value, serving the former with their " in house " operations and routing the latter to an outsourc...

Call graphs are fundamental for many higher-level code analyses. The selection of the most appropriate call graph construction tool an analysis is not always straightforward and depends on purpose results’ further usage. choice has a great effect following tasks’ execution time, memory usage, result quality. This research compares resulting static dynamic Java to assist in tools. Static graphs,...

Many equity markets combine continuous trading and call auctions. Oftentimes designated market makers (DMMs) supply additional liquidity. Whereas prior research has focused on their role in trading, we provide a detailed analysis of activity Using data from Germany’s Xetra system, find that DMMs are most active when they can the greatest benefits to market, i.e., relatively illiquid stocks at t...

This paper considers four schemes for routing low-value calls between the client company and the outsourcer. These schemes vary in the complexity of their routing algorithms, as well as the sophistication of the telephone and information technology infrastructure they require of the two operations. For three of these schemes, we provide a direct characterization of system performance. For the f...